RaycastControllerComponent doUpdateRaycast(
GameObject go,
UpdateRaycastController info
)
{
//For starters, here's the collider.
//@TODO: When ECS has a built-in Collider2D of its own, use that.
BoxCollider2D collider = go.GetComponent <BoxCollider2D>();
//Have to have this, or we can't do anything.
if (collider == null)
{
return(new RaycastControllerComponent());
}
//Convert collider bounds into an ECS format.
float2x2 bounds = getBounds(collider, info.skinWidth);
//Update the ray spacing data.
RaycastControllerComponent state = new RaycastControllerComponent();
CalculateRaySpacing(
bounds,
info.defaultRaySpacing,
ref state
#if UNITY_EDITOR
, go
#endif
);
UpdateRaycastOrigins(bounds, ref state);
return(state);
}
void UpdateRaycastOrigins(float2x2 bounds, ref RaycastControllerComponent state)
{
state.bottomCorners.c0 = bounds.c0;
state.bottomCorners.c1 = new float2(bounds.c1.x, bounds.c0.y);
//Because there's really no compelling reason to store four extra
//floats rather than just one.
state.height = bounds.c1.y - bounds.c0.y;
}
void CalculateRaySpacing(
float2x2 bounds,
float2 defaultRaySpacing,
ref RaycastControllerComponent state
#if UNITY_EDITOR
, GameObject context
#endif
)
{
float2 size = new float2(bounds.c1 - bounds.c0);
// Debug.Log("Size is: " + size);
//Sanity check: abort if ray spacing is 0 on either axis.
Debug.Assert(
defaultRaySpacing.x != 0 && defaultRaySpacing.y != 0,
"This raycast controller has ray spacing of 0 on some axis.",
context
);
float2 rayCountF = size / defaultRaySpacing;
//NOTE: asint doesn't cast to int, it directly reinterprets.
state.rayCount = (int2)math.ceil(rayCountF);
#if UNITY_EDITOR
//Sanity check: never have >50 rays at any point, ever.
//For ease of reading, ensure the magnitude is never above (50,50).magnitude.
if (math.lengthsq(state.rayCount) > 2500)
{
Debug.LogError(
"Somehow ended up with too many rays to check.",
context
);
Debug.Log("Ray spacing calculation is: " + rayCountF);
Debug.Log("Take the ceiling of that, it's: " + math.ceil(rayCountF));
Debug.Log("Ray count, then, is: " + state.rayCount);
}
state.rayCount = math.min(state.rayCount, new int2(50, 50));
//If you read that thread I started about when ECS is gonna get Physics2D,
//you may recall that I was accidentally casting >13,000,000 rays in my
//CharacterController2D updates. This is where that number crept in, so
//this is where I put the sanity check.
#endif
state.raySeparation.x = size.y / (state.rayCount.x - 1);
state.raySeparation.y = size.x / (state.rayCount.y - 1);
}
